ARIES 3" Round Black Steel Step Nerf Bars Model 204045ARIES 3" Round Black Steel Side Bars, Fits Select Silverado, Sierra 1500, 2500, 3500 HD Model 204045 ARIES 3" side bars are more than a fancy decal for your truck, Jeep or SUV. They are a confident first step on each new adventure. These 3" nerf bars are constructed from strong carbon steel for superior rigidity, and they feature a sleek semi gloss black powder coat finish. For an added edge, each nerf bar also goes through an E coat process, before